HT1688: AT&T online supportLearn about AT&T online support
Currently Being ModeratedJan 14, 2013 4:09 PM (in response to JNorris)
Go to settings, general, cellular, cellular data, is it turned on.? If so, go to settings, general, reset, reset network settings.
You can also try resetting your phone, hold the home and off button down until the apple symbol comes up, then release. you wont lose anything.